We went there last July and stayed at this hotel for one night in Kenya Green room which is a duplex. My kids (2 and 5 years old) loved it soooo much. They were so excited to see the giraffes right underneath our balcony at night! If you book it online, it seems the price is more expensive than you booked it through agent (we booked it through agent at around HK$1600), but if you include the price of meals, they are almost the same. We booked it through agent because we knew that we would eat outside the hotel (more flexible as we spent whole day in 小人國 and 六福村). So if you think you may not eat in the hotel, it's cheaper to book it through agent.
Thanks, it seems there are plenty of things to do in the hotel. We also booked the Kenya Green room as it might be more special.
We think we will have dinner there as we planned to spend the whole day in the hotel and won't go to anywhere.